It’s a shame the paradigm of sharing stuff has limited renoise in so many areas, especially considering the (sad) reality of how much stuff is shared.
Well, then go ahead and share something 
I don’t think “limitations” of whatever preset format is the real problem here.
If it’s about solving this problem here:https://forum.renoise.com/t/multi-send/44962 : adding 3 send devices in a row in a song that you are currently working on really isn’t stopping you of realizing your musical ideas.